The current filter press cloth after several years of rapid development, there have been more types and materials for your filter selection, the following is simple and we introduce several kinds of industrial filter cloth materials and conditions for reference purposes only:
Polypropylene filter cloth: a strong acid (organic and inorganic), alkali corrosion and flexibility. Operating temperature up to 110 o C, the price is low, but the fabric is weak, for the fiber-type filter and coarse crystal filter. Polypropylene cloth surface lubrication, soft texture, good slag removal performance; low density, acid, alkali and strong oxidant corrosion and the role of micro-objects. But soluble in xylene, tetrachloroethane solvent, hygroscopicity is low, below 0.3%, the safe use of the temperature below 100 o C, commonly used in pigments, dyes on the filter. Cotton filter cloth: ordinary cotton woven filter cloth can only be used in neutral filter below 100 o C, acidic filter below 20 o C and 10 o C below the basic filter away. In alkaline media, cotton filter cloth will swell. In water and aluminum sulfate solution will produce shrinkage. Therefore, the solution should be used before soaking, making it pre-shrinkage. Cotton cloth on the corrosion resistance of mold weaker resistance, for easy to produce microbial mildew place required copper ammonia pretreatment, resilience will improve. At present, food, detergent filter cloth industry application is more common! Nitrocellulose woven into a filter cloth has a harder appearance, easy to remove slag, concentrated sulfuric acid, nitric acid and its mixed acid and hydrochloric acid solution, zinc chloride solution stability, but not alkali. In the recovery of substances and organic solvents, vulnerable to corrosion. Nitrocellulose filter cloth has a very risk of flammability, which limits its use.
Polyester filter cloth: high strength, flexible, good hemp resistance, long life, superior particle retention performance. Chemical resistance to acid corrosion. Alkali slightly less respect, but better than acrylonitrile fiber. Polyester cloth on the role of microorganisms also have high resilience, many types of polyester filter cloth, the application is common. At present, China's two water phosphoric acid plant phosphate from the phosphate filter, most of the use of gypsum dihydrate 734 # cloth
Wool Fabric: made of ordinary wool, the corrosion resistance of acidic filter slightly better than the cotton cloth, the disposal of 5% -6% of the concentration of inorganic acid materials, the service life of nearly the use of cotton in neutral materials life. Not resistant to high temperature and alkali, nor sodium, calcium hypochlorite damage. Cloths made of camel hair have stability to mineral acids. Woolen fabric in the strength and retention of particles are slightly inferior to the cotton, the price is far higher than the cotton.
Polyamide (Nylon 66) Cloth: It has high strength under wet and dry conditions, long service life, excellent abrasion resistance and good thermal stability. The general application temperature is 120-150oC. Chemical stability in alkaline filter is good, can be used to 100 o C, but in acidic medium, as long as at room temperature, only for dilute acidic material stability.
PVC cloth: acid, salt, mineral oil, the role of microorganisms with a stable energy; but by the oxidant, concentrated alkali will be destroyed. A lubricious appearance, conducive to slag removal, but only below 60 o C use.
Ao Lunbu: It is made of 85% of acrylonitrile plus acrylic acid ester, vinyl pyridine copolymer made of fiber cloth. Has high thermal stability and abrasion resistance, good corrosion resistance to inorganic acids, dissolved in concentrated sulfuric acid concentration of more than 80%. It also has some corrosion resistance to weak bases and strong bases at room temperature. It will not be corroded by common solvents, oils, neutral salts and most acidic salts.
Staggered cloth: Polyester fiber and polyester fiber interlaced filter cloth, with a very smooth appearance and high mechanical strength, free from pollutant obstruction, easy to remove slag. The chemical characteristics of both fibers. Especially suitable for sewage treatment and phosphate plant sour slurry filter. According to foreign reports, its long service life, is a great way out of the new filter cloth.
浙江天台丰顿滤料有限公司是一家专业从事：液体过滤袋、工业滤布、滤布、滤袋、除尘袋生产销售的滤布厂家，多年来在液体过滤袋、滤袋、工业滤布、除尘袋生产上积累了丰富的经验和领先的技术。
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